7
Safety Notes
•
All Bio Amp front-ends and PowerLab units with a built-in Bio Amp
are not defi brillator-protected. Using the Bio Amp to record signals
during defi brillator discharges may damage the input stages of the
amplifi ers. Th
is may result in a safety hazard.
•
Never use damaged Bio Amp cables or leads. Damaged cables and
leads must always be replaced before any connection to humans is
made.
Isolated Stimulator Safety
Instructions
Th
e Isolated Stimulator outputs from a front-end signal conditioner or
a PowerLab with a built-in isolated stimulator are electrically isolated.
However, they can produce pulses of up to 100 V at up to 20 mA. Injury can
still occur from careless use of these devices. Several points must be observed
for safe operation of the Isolated Stimulator:
•
Th
e Isolated Stimulator output must only be used with the supplied
bar stimulus electrode.
•
Th
e Isolated Stimulator output must not be used with individual
(physically separate) stimulating electrodes.
•
Stimulation must not be applied across the chest or head.
•
Do not hold one electrode in each hand.
•
Always use a suitable electrode cream or gel and proper skin
preparation to ensure a low-impedance electrode contact. Using
electrodes without electrode cream can result in burns to the skin or
discomfort for the subject.
•
Subjects with implantable or external cardiac pacemakers, a cardiac
condition, or a history of epileptic episodes must not be subject to
electrical stimulation.
•
Always commence stimulation at the lowest current setting and
slowly increase the current.
•
Stop stimulation if the subject experiences pain or discomfort.
•
Do not use faulty cables, or those that have exhibited intermittent
faults.
•
Do not attempt to measure or record the Isolated Stimulator
waveform while connected to a subject using a PowerLab input or
any other piece of equipment that does not carry the appropriate
safety symbol (see Safety Symbols above).
